Back then it was pretty easy to cheat outright. Things are heavily protected and server based. Anyone HACKING or cheating outright should have charges filed against them because the only way to do so is to hack the anthemro server itself. That is big time illegal. As far as exploits go, I think the GMs and the game developers in general have done a great job in protecting from such things in recent patches. I'm the few years I've played ragnarok online, I've only seen something funny 1 time. Thats something to be proud of i think.
That is a terrible shame that card was taken off. That is a beastly card. Far too powerful for mortal men and women :3